Here are some explanations about the software:

When you switch on the controller you are in “OFF” (LED on), ie the RapidFire is inactive, your controller will work as before.

By pressing the “Sync” button, you go to the next mode, when you get to the last mode, the mode is “OFF”.

When you change modes, the LED will blink as many times as the mode in which you are … example, if you are in 5, the LED flashes 5 times.

For modes above 10 then the LED will flash the number of times 10. Example: you are 14 and mode switching into 15, the LED flashes 5 times. Same for 20, 30 …

By pressing the button longer “Sync”, you switch to “Standby”, ie the Rapidfire is disabled (the LED flashes quickly during the entire period of Fashion “Stand-By”) , to get back again on the current mode simply press and release “Sync”, the LED flashes to indicate which mode you are.